Theodore graham gribble



' (No Model.) I T'. G., GRIBBLB.

-GONSTR'UOTING STREET RAILWAY TRACKS.

No. 449,117. Patented Mar. 31, 1891.

Corzcrei' Clifeazi R hv j fflvemm WW 7 MW v m. 437772 UNITED STATESPATENT OEErcE.

THEODORE GRAHAM GRIBBLE, OF LONDON, ENGLAND.

CONSTRUCTING STREET-RAILWAY TRACKS.

SPECIFICATION forming part of Letters Patent No. 449,117, dated March31, 1891.

Application filed January 13, 1891. Serial No. 377,620- (No model.)

To all whom it may concern:

'Be it known that I, THEODORE GRAHAM GRIBBLE, a citizen of London,England, residing in the city of Yonkers, State of New York, haveinvented a new and useful Improvement in Constructing Street-RailwayTracks; and I do hereby declare that the following is a full, clear, andexact description of the construction and operation of the same,reference being had to the annexed .drawings, making the same a part ofthis specification, in which Figure 1 represents a transverse section ofthe metallic box, gage-bar, rail, and concrete foundation. Fig. 2 showsa perspective view of web I) of the box and slot 0 for the introductionof the gage-bars. Fig.3 represents the gage-bar having wedge-shapedends.

My improvement particularly relates to a form of railway-track havingfor the support of the railway-rails a continuous longitudinal metallicsupport open at the top, bottom, and sides for the introduction ofconcrete or other analogous material, for which I have already madeapplication for Letters Patent, Novemher 8, 1890, Serial No. 370,815..

The object of my present improvement is to effect a more perfectanchorage of the metallic box or longitudinal stringer and to givegreater lateral stiffness and strength to the structure without the useof holding-down bolts, rivets, spikes, or similar attachments and todispense with the metallic yoke system now employed in cable roads. Iattain this object by giving to the metallic sides of the box-shapedstringer, Fig. 1, a taper or enlargement at the bottom or top I) b, sothat it will underlie and engage with the concrete 6 when the latter hasbeen deposited and has set inside the box. The connection between thebox and its foundations will be preserved by their mutual tenacity. Ifirst lay the bottom bed of concrete 6 or other analogous material,after which I place the metallic box I) b in position and fill on theoutside of the box (Z for a few inches in depth. The inside of the boxis then filled completely by means of openings in its upper surface, asshown in the drawing annexed to my first specification, to which Irefer. The upper portion of the concrete e is laid before the lowerportion 6 has set. Thus a monolithic mass is obtained, inclosed in themetallic box I) b.

In order to increase the lateral strength and stiffness of the track andstructure, I

have invented a new method of attaching with the entire metallic yokesystem now in use upon cable roads.

By this device I hold in place laterally the rails and structure,maintaining a uniform gage throughout the entire track, and thus preventthe rails from spreading. I attain these objects by casting slots 0,Fig. 2, opposite one anolher in the vertical webs b of the metallic box,the outside slot being slightly larger than the inside to receive themetallic gage-bar c, which is tapered at both ends to correspond withthe difference of width in the slots. The bar 0 is thus engaged with andis held by the slot 0 laterally in the web and vertically by the cementfilling and overhanging part of the web and rail. The bar is inserted inthe slot 0, Fig. 2, when the metallic box is placed in position, butbefore the same is filled with concrete, and is held in placetemporarily by props while the concrete is being filled in the web andunderneath the bar. When the box is filled with concrete, the barbecomes wedged in the slot and embedded in the concrete and metallicmass.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, with the bed of concrete or like material, ofabox-like longitudinal support open more or less at the bottom and top,the lower parts of web and side walls being provided with enlargementsadapted to underlie and engage with part of the concrete bed, as setforth.

2. A metallic gage-bar having wedge-shaped or tapered ends and fittingwith slots contained in a metallic longitudinal support forrailway-tracks, in combination with a bed of concrete and a box-shapedlongitudinal support for railway-rails, as set forth, said gagebar beingheld in place without the use of bolts, spikes, or rivets, or otherattachments, except the aforesaid slots and the cohesion of concrete.

THEODORE GRAHAM GRIBBLE.

Witnesses:

H. L. GARRISON, PERCY GRIFFITH.

